Established in 1991, Changshu Huagang Pharmaceutical Co.,ltd. is a manufactory majoring western medicine. Covering an area of over three thousands square meters, Huagang has more than 50 million capital asserts with over 150 employers among which around 30 are professionals and technicians. Located in Yangtse river delta the most developed area in China, neighboring Shanghai the largest port in the world, Huagang has so much attraction and unique predominance to investors home and abroad.

In 1991, Changshu pharmachemical factory was founded and paracetamol had been produced with its registered trade mark Chengzhu.